Rotary switching type upper press fitting device

Abstract

The utility model relates to a rotary switching type upper press fitting device which comprises a machine frame, a pressing head assembly, a first air cylinder and a material pressing rotary disc. A plurality of sets of pressing rod mechanisms are arranged on the pressing rotary disc and driven by a pressing rotary disc driving mechanism (comprising a first servo motor, a belt and a belt wheel) to rotate, the different pressing rod mechanisms correspond to the output end of a first air cylinder in sequence, multi-procedure pressing such as threaded guide rod pressing, steel ball sleeve screw assembling and edge riveting is completed, the production efficiency is improved, and the equipment requirement is reduced. The device is further provided with a positioning assembly, a conical positioning rod driven by a second air cylinder is matched with a positioning sleeve, and stable positioning of the pressing rotary disc is guaranteed. A first guide cylinder is arranged at the first through hole to prevent abrasion from affecting precision. The driving mechanism is provided with an adjusting frame and an adjusting bolt, the installation position can be flexibly adjusted, and different production requirements are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to a rotation switching type upper pressing device. BACKGROUND

[0002] The brake small assembly is a key component in the parking brake, which is used to activate the hand brake to push the piston to combine the brake pad and the brake disc after the vehicle is parked, and ensure the vehicle is parked. It is mainly composed of spring seat cover, spring, steel ball cover, steel ball cover screw, threaded guide rod, steel ball and gasket. The brake small assembly mentioned in the application is a part of the brake caliper assembly in the patent "CN205025976U", which is installed on the parking caliper body. It is connected to the rotating support through the steel ball cover screw at one end, and connected to the adjusting nut through the threaded guide rod at the other end. When the rotating support moves, it is driven by the steel ball cover screw to drive the brake pad to realize the braking function. The patent specification shows its structure and installation position. Figure 1

[0003] However, in the production process of the brake small assembly, after each component is completed, it needs to go through multiple assembly processes to form a complete assembly. This involves threaded guide rod pressing, steel ball cover screw assembly, lower pressing and riveting edge action and other key steps. The existing pressing tool has limitations in this regard, and it is usually difficult to complete all processes on a single device, resulting in the need to use multiple devices, multiple product transfers, and the inability to achieve one-machine molding, increasing the complexity and cost of production. UTILITY MODEL CONTENT

[0004] The technical problem to be solved by the utility model is to provide a rotation switching type upper pressing device, a pressing rod mechanism of a pressing disc, to realize multi-process pressing, improve efficiency and adapt to different production needs.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: a rotation switching type upper pressing device, comprising a rack, a pressing head assembly is arranged on the rack, a first cylinder is arranged above the pressing head assembly, the rack is provided with a first through hole corresponding to the output end of the first cylinder, characterized in that: the pressing head assembly comprises a pressing disc, the pressing disc is linked with a plurality of groups of pressing rod mechanisms which are arranged in the circumferential direction of the pressing disc and are spaced apart in sequence, the pressing disc is linked with a pressing disc driving mechanism, the pressing disc driving mechanism is used for driving the pressing disc to rotate, when a group of pressing rod mechanisms corresponds to the first through hole, the output end of the first cylinder can pass through the first through hole and drive a group of pressing rod mechanisms to reciprocate along the axis direction of the first cylinder.

[0006] ​The rotation of the pressing disc makes the plurality of pressing rod mechanisms correspond to the output end of the first cylinder in sequence, so that the upper pressing device provided by the scheme realizes efficient completion of the pressing of the threaded guide rod, the assembly of the steel ball sleeve screw rod, the lower pressing and riveting edge action and other pressing processes. The problem of needing multiple equipment and multiple product transfer in traditional production is avoided, and the production efficiency is greatly improved. Further, the rotation direction of the pressing disc is not unique. For example, if a certain pressing rod mechanism fails or needs to be re-pressed, the pressing disc can be rotated in one direction or reversed according to the actual situation, and different pressing rod mechanisms can be flexibly switched to adapt to the production needs of brake small assemblies of different specifications and models. The output end of the first cylinder passes through the first through hole to work on a group of pressing rod mechanisms located below the first through hole.

[0007] The rotating switching type upper pressing device can be further provided with a positioning assembly for positioning the pressing disc, the positioning assembly comprising a positioning rod and a second cylinder linked with the positioning rod, a group of positioning holes arranged on the pressing disc being distributed between each adjacent two groups of pressing rod mechanisms, a group of positioning sleeves being installed at the positioning holes, and the end of the positioning rod away from the second cylinder being conical.

[0008] With the above technical scheme, in the pressing process, the positioning assembly can stably keep the pressing disc in a working state through the cooperation of the positioning rod and the positioning sleeve, so as to avoid rotation or deviation of the pressing disc and ensure that each group of pressing rod mechanisms can accurately align with the first through hole, thereby realizing accurate pressing action. When the pressing rod mechanism needs to be changed, the second cylinder controls the positioning rod to exit the positioning sleeve, and the pressing disc can be rotated. The end of the positioning rod is conical, which facilitates the insertion of the positioning rod into the positioning sleeve. By arranging the positioning sleeve instead of the positioning hole and the positioning rod, the excessive wear of the pressing disc is avoided, and the service life is prolonged.

[0009] The rotating switching type upper pressing device can be further provided with a positioning assembly for positioning the pressing disc, the positioning assembly comprising a positioning rod and a second cylinder linked with the positioning rod, a group of positioning holes arranged on the pressing disc being distributed between each adjacent two groups of pressing rod mechanisms, a group of positioning sleeves being installed at the positioning holes, and the end of the positioning rod away from the second cylinder being conical.

[0010] The first sliding hole in the first guide cylinder replaces the first through hole to cooperate with the output rod of the first cylinder, avoiding the first through hole from being enlarged due to wear, and even if the first sliding hole is enlarged due to wear, only the first guide cylinder needs to be replaced, without replacing the whole plate used for machining the first through hole. Meanwhile, the first guide cylinder is also used for guiding the extension and retraction of the output rod of the first cylinder, further improving the accurate correspondence between the first cylinder and the first through hole, so that the pressure rod mechanism is accurately driven to perform the pressure assembly action. The second sliding hole is arranged in the second guide cylinder and is used for guiding the extension and retraction of the positioning rod (the second cylinder drives the positioning rod to reciprocate), further improving the accurate correspondence between the positioning rod and the positioning sleeve, so as to ensure that the material pressing turntable is stably kept at the working position.

[0011] The above-mentioned rotary switching type upper pressure assembly device can be further provided as follows: the material pressing turntable driving mechanism comprises a belt and a driving pulley and a driven pulley linked with both ends of the belt, the driven pulley is fixed below the material pressing turntable, and the driven pulley is provided with a set of clearance hole corresponding to each set of pressure rod mechanism, and the driving pulley is linked with the first servo motor.

[0012] The above-mentioned rotary switching type upper pressure assembly device can be further provided as follows: the material pressing turntable driving mechanism comprises a belt and a driving pulley and a driven pulley linked with both ends of the belt, the driven pulley is fixed below the material pressing turntable, and the driven pulley is provided with a set of clearance hole corresponding to each set of pressure rod mechanism, and the driving pulley is linked with the first servo motor.

[0013] The above-mentioned rotary switching type upper pressure assembly device can be further provided as follows: the material pressing turntable driving mechanism further comprises an adjusting frame and an adjusting bolt, the body of the first servo motor is fixed on the adjusting frame, the adjusting frame is provided with a plurality of first strip-shaped holes parallel to each other, the first strip-shaped hole is connected with a fastener, the fastener is detachably connected with the rack, the side of the adjusting frame is provided with a T-shaped groove, the cap part of the adjusting bolt is clamped in the T-shaped groove, the rod part of the adjusting bolt is threadedly connected with a connecting block, and the connecting block is fixed on the rack and provided with a connecting hole threadedly connected with the adjusting bolt.

[0014] The above-mentioned rotary switching type upper pressure assembly device can be further provided as follows: the material pressing turntable driving mechanism further comprises an adjusting frame and an adjusting bolt, the body of the first servo motor is fixed on the adjusting frame, the adjusting frame is provided with a plurality of first strip-shaped holes parallel to each other, the first strip-shaped hole is connected with a fastener, the fastener is detachably connected with the rack, the side of the adjusting frame is provided with a T-shaped groove, the cap part of the adjusting bolt is clamped in the T-shaped groove, the rod part of the adjusting bolt is threadedly connected with a connecting block, and the connecting block is fixed on the rack and provided with a connecting hole threadedly connected with the adjusting bolt.

[0015] The rotating switching type upper pressing assembly device can be further provided with: the pressing rod mechanism comprises a guide sleeve which is hollow and open at both ends, the pressing material rotating disc is provided with a plurality of groups of second through holes, the upper end of each guide sleeve is mounted in a group of second through holes, a pressing rod is slidably connected in the guide sleeve, the pressing rod is linked with a reset member, and the lower end of the pressing rod is linked with a clamping member capable of clamping a processed product, the reset member comprises a spring which is sleeved on the outer periphery of the pressing rod, the upper end of the pressing rod is fixed with an upper flange, the upper flange is in clearance fit with the guide sleeve, the guide sleeve is fixed with a lower flange which is arranged opposite to the upper flange, and one end of the spring is in abutting connection with the upper flange and the other end is in abutting connection with the lower flange.

[0016] By matching the guide sleeve and the second through holes on the pressing material rotating disc, the above technical scheme realizes accurate positioning of the pressing rod and ensures the accuracy in the pressing process. Since the pressing material rotating disc can rotate until different guide sleeves correspond to the first through holes, different pressing rod mechanisms can be quickly switched, and the work efficiency is improved. Since the clamping member can be replaced according to different processed products, the upper pressing assembly device can adapt to processed products of different shapes and sizes, and the pressing application range of the device is increased. The spring ensures that the pressing rod can be automatically reset after completing the pressing. The hollow guide sleeve design makes the device structure compact and occupies small space, and is convenient for integration into the existing production line. The specific operation is as follows: the pressing material rotating disc rotates under the driving of the pressing material rotating disc driving mechanism, different guide sleeves correspond to the second through holes, only one group of guide sleeves corresponds to the first through hole at a time, the output end of the first air cylinder passes through the first through hole to push the pressing rod to press down, the lower part of the pressing rod is provided with a clamping member for clamping the processed product, after completing the pressing, the first air cylinder is reset, and the pressing rod is automatically reset under the action of the spring.

[0017] The rotating switching type upper pressing assembly device can be further provided with: the upper end of one group of clamping members is provided with a connecting hole, the lower end of the pressing rod is provided with a plug which matches the connecting hole, the lower end of the clamping member is provided with a counterbore, and the lower end of the clamping member is further provided with a plurality of groups of missing grooves which are distributed at the outer periphery of the counterbore.

[0018] By setting the connecting hole and the plug, the above technical scheme can realize detachable connection of the clamping member and the pressing rod. The counterbore and the missing grooves are further provided to facilitate the clamping member to clamp the threaded guide rod on the brake small assembly.

[0019] The rotating switching type upper pressing assembly device can be further provided with: the upper end of one group of clamping members is provided with a connecting hole, the lower end of the pressing rod is provided with a plug which matches the connecting hole, the lower end of the clamping member is provided with a cylindrical insertion hole, and the lower end of the clamping member is further provided with a guide insertion hole which is distributed at the side of the cylindrical insertion hole.

[0020] The connecting hole and the plug are arranged, so that the detachable connection between the clamping piece and the pressing rod is realized.

[0021] The rotating switching type upper pressing device can be further provided with a connecting hole arranged at the upper end of a clamping piece, a plug arranged at the lower end of the pressing rod and matched with the connecting hole, and a riveting block uniformly arranged at the lower end surface of the clamping piece and sequentially and spacedly arranged along the circumference of the clamping piece.

[0022] The connecting hole and the plug are arranged, so that the detachable connection between the clamping piece and the pressing rod is realized. The riveting block is further arranged to rivet and press the outer edge of the brake small assembly.

[0023] The utility model will be further explained in detail in combination with the drawings and examples. DRAWINGS

[0024] Figure 1 The overall structure of the embodiment of the utility model Figure 1 ;

[0025] Figure 2 The overall structure of the embodiment of the utility model Figure 2 ;

[0026] Figure 3 The internal structure of the embodiment of the utility model is removed from the rack

[0027] Figure 4 The partial structure of the embodiment of the utility model is exploded

[0028] Figure 5 The structure of the three clamping pieces of the embodiment of the utility model is schematically shown

[0029] Figure 6 is Figure 1 The local enlarged schematic view of A in the embodiment of the utility model

[0030] Label annotations: First cylinder b1, first through hole b2, first guide cylinder b3, first sliding hole b4, pressure turntable b5, belt b6, driving pulley b7, driven pulley b8, first servo motor b9, adjusting frame b10, adjusting bolt b11, first strip hole b12, T-slot b13, connecting block b14, positioning rod b15, second cylinder b16, positioning hole b17, positioning sleeve b18, second guide cylinder b19, second sliding hole b20, guide sleeve b21, second through hole b22, pressure rod b23, clamping piece b24, upper flange b25, lower flange b26, connecting hole b27, insert block b28, countersunk hole b25, cylindrical insert hole b26, guide insert hole b27, riveting block b28. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] like Figures 1 to 6 The rotary switching type pressing device shown includes a frame, a pressing head assembly mounted on the frame, and a first cylinder b1 distributed above the pressing head assembly. The frame has a first through hole b2 corresponding to the output end of the first cylinder b1. A first guide cylinder b3 is fixed at the first through hole b2, and a first sliding hole b4 passes through the first guide cylinder b3. The first sliding hole b4 in the first guide cylinder b3 replaces the first through hole b2 to cooperate with the output rod of the first cylinder b1, preventing the diameter of the first through hole b2 from increasing due to wear. Even if the diameter of the first sliding hole b4 increases due to wear, only the first guide cylinder b3 needs to be replaced; there is no need to replace the entire plate used for processing the first through hole b2. Simultaneously, the first guide cylinder b3 also guides the extension and retraction of the output rod of the first cylinder b1, improving the accurate correspondence between the first cylinder b1 and the first through hole b2, thereby accurately driving the pressing rod mechanism to perform the pressing action.

[0033] The pressure head assembly includes a pressure turntable b5, which is linked to three sets of pressure rod mechanisms arranged at intervals along the circumference of the pressure turntable b5. The pressure turntable b5 is also linked to a pressure turntable drive mechanism, which drives the pressure turntable b5 to rotate.

[0034] The pressing rotary disc driving mechanism comprises a belt b6, a driving belt wheel b7 and a driven belt wheel b8 connected by the belt b6, the driven belt wheel b8 is fixed below the pressing rotary disc b5, and the driven belt wheel b8 is provided with a set of clearance holes corresponding to each set of pressing rod mechanisms, and the driving belt wheel b7 is connected with a first servo motor b9.

[0035] The pressing rotary disc driving mechanism further comprises an adjusting frame b10 and an adjusting bolt b11, the body of the first servo motor b9 is fixed on the adjusting frame b10, the adjusting frame b10 is provided with a plurality of first parallel strip holes b12, the first strip holes b12 are connected with fasteners, the fasteners are detachably connected with the rack, the side of the adjusting frame b10 is provided with a T-shaped groove b13, the cap of the adjusting bolt b11 is clamped in the T-shaped groove b13, the rod of the adjusting bolt b11 is threadedly connected with a connecting block b14, the connecting block b14 is fixed on the rack and is provided with a connecting hole b27 threadedly connected with the adjusting bolt b11. When the installation position of the pressing rotary disc driving mechanism needs to be adjusted, the fastener at the first strip hole b12 is loosened (the fastener can be a standard part such as a screw), the adjusting frame b10 can be directly removed due to the structure of the T-shaped groove b13, the adjusting bolt b11 is rotated according to the actual needs, the extension length of the adjusting bolt b11 compared with the connecting block b14 is changed, until the required length, the T-shaped groove b13 of the adjusting frame b10 is clamped on the cap of the adjusting bolt b11, and finally the adjusting member is fixed on the rack by using the fastener and the first strip hole b12.

[0036] The rack is further provided with a positioning assembly for positioning the pressing disc b5, the positioning assembly comprising a positioning rod b15 and a second cylinder b16 linked with the positioning rod b15, and a set of positioning holes b17 arranged on the pressing disc b5 is distributed between every two adjacent pressing rod mechanisms, a set of positioning sleeves b18 is installed at the positioning holes b17, and the end of the positioning rod b15 away from the second cylinder b16 is tapered. A second guide cylinder b19 corresponding to the positioning rod b15 is arranged on the rack, and a second sliding hole b20 is penetrated in the second guide cylinder b19. The second sliding hole b20 arranged in the second guide cylinder b19 is used for guiding the extension and retraction action (the second cylinder b16 drives the positioning rod b15 to reciprocate) of the positioning rod b15, further improves the accurate correspondence between the positioning rod b15 and the positioning sleeve b18, and thus ensures that the pressing disc b5 is stably kept in the working position. During the pressing process, the positioning assembly can stably keep the pressing disc b5 in the working state through the cooperation of the positioning rod b15 and the positioning sleeve b18, avoids the rotation or deviation of the pressing disc b5, ensures that every pressing rod mechanism can accurately align with the first sliding hole b4, and thus realizes the precise pressing action. When the pressing rod mechanism needs to be changed, the second cylinder b16 controls the positioning rod b15 to exit the positioning sleeve b18, and the pressing disc b5 can be rotated. The end of the positioning rod b15 is tapered, which facilitates the insertion of the positioning rod b15 into the positioning sleeve b18. Through the arrangement of the positioning sleeve b18, the positioning hole b17 and the positioning rod b15 are replaced to cooperate, which avoids the excessive wear of the pressing disc b5 and prolongs the service life.

[0037] The pressing rod mechanism comprises a guide sleeve b21 which is hollow and open at both ends, the pressing material rotating disc b5 is provided with three groups of second through holes b22, the upper end of each guide sleeve b21 is mounted in a group of second through holes b22, a pressing rod b23 is slidably connected in the guide sleeve b21, the pressing rod b23 is linked with a reset member, the lower end of the pressing rod b23 is linked with a clamping member b24 capable of clamping a processed product, the reset member comprises a spring sleeved on the outer periphery of the pressing rod b23, the upper end of the pressing rod b23 is fixed with an upper flange b25, the upper flange b25 is in clearance fit with the guide sleeve b21, the guide sleeve b21 is fixed with a lower flange b26 arranged opposite to the upper flange b25, one end of the spring is in abutting connection with the upper flange b25 and the other end is in abutting connection with the lower flange b26. Through the cooperation of the guide sleeve b21 and the second through holes b22 on the pressing material rotating disc b5, the precise positioning of the pressing rod b23 is realized, and the accuracy in the pressing process is ensured. Since the pressing material rotating disc b5 can rotate until different guide sleeves b21 correspond to the first through hole b2, different pressing rod mechanisms can be quickly switched, and the work efficiency is improved. Since the clamping member b24 can be replaced according to different processed products, the pressing device can adapt to different shapes and sizes of processed products, and the pressing application range of the device is increased. The spring ensures that the pressing rod b23 can be automatically reset after completing the pressing. The hollow guide sleeve b21 design makes the device structure compact, occupies small space, and is convenient for integration into the existing production line. The specific operation is as follows: the pressing material rotating disc b5 is rotated under the driving of the pressing material rotating disc driving mechanism, different guide sleeves b21 will correspond to the second through holes b22, only one group of guide sleeves b21 corresponds to the first through hole b2 at a time, the output end of the first air cylinder b1 passes through the first through hole b2 to push the pressing rod b23 to press down, the lower part of the pressing rod b23 is provided with the clamping member b24 for clamping the processed product, after completing the pressing, the first air cylinder b1 is reset, and the pressing rod b23 is automatically reset under the action of the spring.

[0038] One end of the pressing rod b23 is provided with a connecting hole b27, the other end of the pressing rod b23 is provided with a plug b28 matched with the connecting hole b27, the lower end of the clamping member b24 is provided with a counterbore b25, and the lower end of the clamping member b24 is also provided with a plurality of groups of missing grooves distributed on the outer periphery of the counterbore b25. By arranging the connecting hole b27 and the plug b28, the detachable connection of the clamping member b24 and the pressing rod b23 can be realized. The counterbore b25 and the missing grooves are further arranged to facilitate the clamping of the threaded guide rod on the brake small assembly by the clamping member b24.

[0039] A set of assembly clamps b24 upper end is provided with connecting hole b27, the lower end of the pressure bar b23 is provided with the plug b28 matched with the connecting hole b27, the lower end of the assembly clamp b24 is provided with the cylindrical insert hole b26, the lower end of the assembly clamp b24 is further provided with the guide insert hole b27 distributed in the side of the cylindrical insert hole b26. By setting the connecting hole b27, the plug b28, the detachable connection of the assembly clamp b24 and the pressure bar b23 can be realized. Further setting the cylindrical insert hole b26 to facilitate the insertion of the rod of the steel ball sleeve screw; setting the guide insert hole b27 to position when the steel ball sleeve screw is clamped, so as to facilitate the steel ball sleeve screw to be pressed in the correct direction.

[0040] A set of assembly clamps b24 upper end is provided with connecting hole b27, the lower end of the pressure bar b23 is provided with the plug b28 matched with the connecting hole b27, the lower end of the assembly clamp b24 is provided with the cylindrical insert hole b26, the lower end of the assembly clamp b24 is further provided with the guide insert hole b27 distributed in the side of the cylindrical insert hole b26. By setting the connecting hole b27, the plug b28, the detachable connection of the assembly clamp b24 and the pressure bar b23 can be realized. Further setting the cylindrical insert hole b26 to facilitate the insertion of the rod of the steel ball sleeve screw; setting the guide insert hole b27 to position when the steel ball sleeve screw is clamped, so as to facilitate the steel ball sleeve screw to be pressed in the correct direction.

[0041] The specific operation of the embodiment applied to the press-fitting of the brake small assembly is as follows:

[0042] Firstly, the threaded guide rod is placed on a set of assembly clamps b24 by hand, and the assembly clamp b24 is provided with a countersunk hole b25 and a missing slot. The first air cylinder b1 drives the pressure bar b23 to move downward, and the pressure bar b23 drives the set of assembly clamps b24 to move downward until the threaded guide rod is press-fitted onto the brake small assembly. The assembly clamp b24 can be made of a material with magnetism, so that the threaded guide rod can be stably clamped on the assembly clamp b24.

[0043] Secondly, the first servo motor b9 drives the material pressing turntable b5 to rotate until the next set of guide sleeves b21 corresponds to the first through hole b2. The steel ball sleeve screw is placed on a set of assembly clamps b24 by hand, and the assembly clamp b24 is provided with a cylindrical insert hole b26 and a guide insert hole b27. The first air cylinder b1 drives the pressure bar b23 to move downward, and the pressure bar b23 drives the set of assembly clamps b24 to move downward until the steel ball sleeve screw is press-fitted onto the brake small assembly. The assembly clamp b24 can be made of a material with magnetism, so that the steel ball sleeve screw can be stably clamped on the assembly clamp b24.

[0044] Finally, the first servo motor b9 drives the material pressing turntable b5 to rotate until the next set of guide sleeves b21 corresponds to the first through hole b2. The first air cylinder b1 drives the pressure bar b23 to move downward, and the pressure bar b23 drives the set of assembly clamps b24 to move downward, and the assembly clamp b24 is provided with a riveting block b28 until the outer edge of the brake small assembly is riveted.

[0045] It should be noted that the embodiment is developed for assembling the brake small assembly, but in actual use, it is not limited to assembling the brake small assembly. By changing the structure shape of the clamping piece b24, the press fitting of different parts can be adapted. The embodiment can realize multi-process press fitting, without multiple equipment or multiple operation of products, improving the production efficiency. By rotating the press material turntable b5, different press rod mechanisms can be switched according to the needs, realizing the flexibility of one machine with multiple uses.

Claims

1. A rotary switching type upper pressing device, comprising a frame, wherein a pressing head assembly and a first cylinder distributed above the pressing head assembly are provided on the frame, and the frame is provided with a first through hole corresponding to the output end of the first cylinder, characterized in that: The pressure head assembly includes a pressure turntable, which is linked to several sets of pressure rod mechanisms arranged sequentially at intervals along the circumference of the pressure turntable. The pressure turntable is also linked to a pressure turntable drive mechanism, which drives the pressure turntable to rotate. When a set of pressure rod mechanisms corresponds to the first through hole, the output end of the first cylinder can pass through the first through hole and drive the set of pressure rod mechanisms to reciprocate along the axial direction of the first cylinder.

2. The rotary switching type upper pressing device according to claim 1, characterized in that: The frame is also equipped with a positioning component for positioning the pressure plate. The positioning component includes a positioning rod and a second cylinder that is linked to the positioning rod. A set of positioning holes on the pressure plate is distributed between each pair of adjacent pressure rod mechanisms. A set of positioning sleeves is installed at the positioning holes. The end of the positioning rod away from the second cylinder is tapered.

3. The rotary switching type upper pressing device according to claim 2, characterized in that: A first guide cylinder is fixed at the first through hole, and a first sliding hole is passed through the first guide cylinder. A second guide cylinder is provided on the frame corresponding to the positioning rod, and a second sliding hole is passed through the second guide cylinder.

4. The rotary switching type upper pressing device according to claim 1, characterized in that: The material pressing turntable drive mechanism includes a belt and a drive pulley and a driven pulley that are linked to both ends of the belt. The driven pulley is fixed below the material pressing turntable, and each driven pulley is provided with a set of clearance holes corresponding to each set of pressure rod mechanisms. The drive pulley is linked to a first servo motor.

5. The rotary switching upper pressing device according to claim 4, characterized in that: The pressure turntable drive mechanism also includes an adjustment frame and an adjustment bolt. The body of the first servo motor is fixed on the adjustment frame. The adjustment frame has several sets of parallel first strip holes. Fasteners are connected to the first strip holes. The fasteners are detachably connected to the frame. The side of the adjustment frame has a T-slot. The head of the adjustment bolt is engaged in the T-slot. The shank of the adjustment bolt is threaded with a connecting block. The connecting block is fixed on the frame and has a connecting hole that is threadedly connected to the adjustment bolt.

6. The rotary switching upper pressing device according to any one of claims 1 to 5, characterized in that: The pressure rod mechanism includes a guide sleeve that is hollow inside and open at both ends. The pressure plate has several sets of second through holes. The upper end of each set of guide sleeves is installed in a set of second through holes. A pressure rod is slidably connected inside the guide sleeve. The pressure rod is linked to a reset component, and the lower end of the pressure rod is linked to a clamping component capable of clamping the processed product. The reset component includes a spring sleeved on the outer periphery of the pressure rod. An upper flange is fixed to the upper end of the pressure rod. The upper flange is clearance-fitted with the guide sleeve. A lower flange is fixed inside the guide sleeve and is opposite to the upper flange. One end of the spring is in contact with the upper flange and the other end is in contact with the lower flange.

7. The rotary switching upper pressing device according to claim 6, characterized in that: The upper end of the clamping component is provided with a connecting hole, the lower end of the pressure rod is provided with a plug that mates with the connecting hole, the lower end of the clamping component is provided with a countersunk hole, and the lower end of the clamping component is also provided with several sets of notches spaced apart on the outer periphery of the countersunk hole.

8. The rotary switching upper pressing device according to claim 6, characterized in that: The upper end of the clamping component is provided with a connecting hole, the lower end of the pressure rod is provided with a plug that mates with the connecting hole, the lower end of the clamping component is provided with a cylindrical plug hole, and the lower end of the clamping component is also provided with guide plug holes distributed on the side of the cylindrical plug hole.

9. The rotary switching type upper pressing device according to claim 6, characterized in that: A clamping component has a connecting hole at its upper end, and a plug that mates with the connecting hole is provided at the lower end of the pressure rod. Several sets of rivet blocks are evenly distributed on the lower end face of the clamping component and are arranged at intervals along the circumference of the clamping component.

Images